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#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <netpbm/pm.h>
#include "stdio_nofail.h"
size_t
fread_or_eof_nofail(void * const ptr,
size_t const size,
size_t const nmemb,
FILE * const streamP) {
size_t rc;
rc = fread(ptr, size, nmemb, streamP);
if (rc < nmemb) {
if (!feof(streamP))
pm_error("File read failed. Errno=%d (%s)",
errno, strerror(errno));
}
return rc;
}
void
fread_nofail(void * const ptr,
size_t const size,
size_t const nmemb,
FILE * const streamP) {
size_t rc;
rc = fread(ptr, size, nmemb, streamP);
if (rc < nmemb) {
if (feof(streamP))
pm_error("File read failed. Premature end of file");
else
pm_error("File read failed. Errno=%d (%s)",
errno, strerror(errno));
}
}
int
fgetc_nofail(FILE * streamP) {
int rc;
rc = fgetc(streamP);
if (rc == EOF) {
if (feof(streamP))
pm_error("File read failed. Premature end of file");
else
pm_error("File read failed. Errno=%d (%s)",
errno, strerror(errno));
}
return rc;
}
int
fseek_nofail(FILE * const streamP,
long const offset,
int const whence) {
int rc;
rc = fseek(streamP, offset, whence);
if (rc < 0)
pm_error("File seek failed. Errno=%d (%s)", errno, strerror(errno));
return rc;
}
long
ftell_nofail(FILE * const streamP) {
long rc;
rc = ftell(streamP);
if (rc < 0)
pm_error("File position query failed. Errno=%d (%s)",
errno, strerror(errno));
return rc;
}
char *
fgets_nofail(char * const s,
int const size,
FILE * const streamP) {
char * rc;
rc = fgets(s, size, streamP);
if (ferror(streamP))
pm_error("File read failed. Errno=%d (%s)", errno, strerror(errno));
return rc;
}
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